The helicopter ride itself was pretty good. What I didn't like is that Maverick called a few days before my reservation to tell me that the time slot (1515) I had booked wasn't available, but that they could move me to a 1645 slot. This completely disrupted the itinerary I had planned for my girlfriend and me. When I asked if they'd be able to give me a discount or a benefit for the trouble of cancelling other reservations and plans, they couldn't because I had booked through Viator.
In fact, the customer service rep told me that even if I had booked directly with them, they could have only offered the standard 10% discount that military and AZ residents already get, but since I would have already used that discount, they wouldn't have been able to reduce the price any more. So essentially, they wrecked my carefully constructed plan at the Grand Canyon and offered me nothing in return.
Great pilot, though, and tremendous views of the canyon from the bubble canopy of the Euro-Copter!